KR970003299Y1 - Color picture tube of frame - Google Patents

Abstract

None.

Description

Frame of color tube

1 is a longitudinal cross-sectional view of a general color brown tube.

2 is an enlarged state diagram of system A. FIG.

Figure 3 is a partial longitudinal cross-sectional view showing an embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

3: magnetic shield 3a: magnetic shield attachment surface

49: frame

The present invention relates to a frame of a color CRT, and more particularly, to improve a formability of a frame supporting a magnetic shield while maintaining a predetermined distance from the inner surface of the panel to face a shadow mask. This is to prevent halation caused by the former.

In general, the color-brown tube is an outer container consisting of the panel 2, the funnel 10, and the neck portion 9, as shown in FIG. 1, the neck portion 9 has an electron gun 6, and the electron gun in front of it. An electron deflecting device 7 for deflecting the three electron beams 5 emitted from 6 is provided.

The inner surface of the panel 2 is coated with a phosphor 8 which emits light in three colors, and a shadow mask 1 in which numerous gaps are formed, such as voids or circular thin holes, in order to maintain a constant distance from the phosphor 8. Is installed and the shadow mask 1 is fixed to the frame 49 by welding at a predetermined interval.

A magnetic shield 3 is fixed to the rear of the frame 4a to shield and control the influence of the electron beam 5 emitted from the electron gun 6 from an environmental magnetic field such as a support system.

Therefore, the three electron beams 5 emitted from the electron gun 6 are deflected by the electron deflector 7 and projected through a thin hole of the shadow mask 1, which serves as color screening, to be projected onto a predetermined phosphor 8. The light is emitted but the rest of the electron beam 5 is projected onto the shadow mask 1.

At this time, the frame 4a supports the magnetic shield 3 to zoom and at the same time maintains the shadow mask 1 at a predetermined distance from the panel 2, and also distributes the shadow mask 1 by external impact. The thickness of the magnetic shield 3 and the shadow mask 1 are thicker than the magnetic shield 3 and the shadow mask 1.

However, in the conventional frame 4a, the electron beam 5 emitted from the electron gun 6 hits the end surface 4b of the frame 4a having a thick thickness as shown in FIG. Since the state enters the thin hole of the shadow mask 1 and emits a different color, there is a problem of causing halation.

Accordingly, in view of the above-described problems, the frame as shown in FIG. 2B can prevent the electron beam 5 emitted from the electron gun 6 from hitting the end of the frame 4a and entering the thin hole of the shadow mask 1. The end portion of 4a is bent inward by the β angle to prevent the electron beam 5 from colliding with the bending surface 4c and entering the thin hole of the shadow mask 1, but the bending angle β of the frame 4a. Not only was it very difficult to manage, but also required a separate forming process, there was a problem such as an increase in production costs.

The object of the present invention is to provide a frame of a color-brown tube that can prevent the collision with the end of the electron beam emitted from the electron gun.

According to an embodiment of the present invention for achieving the above object there is provided a frame of a color brown tube in which the upper portion of the frame to which the magnetic shield is attached is inclined toward the panel surface.

Hereinafter, an embodiment of the present invention will be described in detail with reference to FIG. 3.

3 is a partial longitudinal sectional view showing an embodiment of the present invention, wherein the shadow mask 1 is maintained at a predetermined distance from the panel 2 and the upper portion of the frame 4 to which the magnetic shield 3 is attached is directed toward the panel surface. It is formed to be inclined.

In addition, the direction of movement of the outermost electron beam 5 and the frame 4 which do not strike the angle? At which the magnetic shield attaching surface 3a and the frame 4 side surface are perpendicular to the magnetic shield attaching surface 3a. 90 °-greater than the angle α It is formed to be smaller and configured to prevent the electron beam 5 emitted from the electron gun 6 from colliding with the end of the frame 4.

According to the present invention configured as shown in FIG. 3, an electron beam 5 of three colors of R, G, and B is emitted from the electron gun 6 and overscanned by the electron deflector 7 to obtain a shadow mask ( Go to 1).

At this time, the angle 13 which is perpendicular to the magnetic shield attaching surface 3a and the side of the frame 4, and the moving direction and the frame 4 of the outermost electron beam 5 which do not collide with the magnetic shield attaching surface 3a. ) The angle α of the side part is α≤γ≤90 °- The outermost electron beam 5 due to this satisfies the predetermined phosphor 8 through light holes formed in the shadow mask 1 without colliding with the frame 4 to emit light.

As described above, the present invention, by forming the frame 4 to which the magnetic shield 3 is inclined, it is possible to prevent the electron beam 5 from colliding with the end of the frame to cause the halogen. The moldability of the frame 4 can be improved, and manufacturing cost can be reduced.

Claims (2)

The frame of the color-brown tube, characterized in that the upper portion of the frame (4) to which the self-sealing (3) is attached is inclined toward the panel surface. The angle? Of the frame 4 side and the magnetic shield attaching surface 3a, the angle? Between the direction of movement of the outermost electron beam 5 and the side of the frame 4, respectively. ) Is α≤γ≤90 °- Frame of colored color crown.